Time for action – developing the game architecture

Create a new Qt Widgets Application project. After the project infrastructure is ready, choose New File or Project from the File menu and choose to create a C++ Class. Call the new class ChessBoard and set QObject as its base class. Repeat the process to create a GameAlgorithm class derived from QObject and another one called ChessView but, this time, choose QWidget as the base class. You should end up with a file named main.cpp and four classes—MainWindow, ChessView, ChessBoard, and ChessAlgorithm.

Now navigate to the header file for ChessAlgorithm and add the following methods to the class:

public:
  ChessBoard* board() const;
public slots:
  virtual void newGame();
signals:
  void boardChanged(ChessBoard*);
protected:
  virtual void setupBoard();
  void setBoard(ChessBoard *board);

Also, add a private m_board field of type ChessBoard*. Remember to either include chessboard.h or forward-declare the ChessBoard class. Implement board() as...